<template>
  <div class="container">
    <div class="left-board">
      <!-- <div class="logo-wrapper">
        <div class="logo">
          <img :src="logo" alt="logo"> Form Generator
          <a class="github" href="https://github.com/JakHuang/form-generator" target="_blank">
            <img src="https://github.githubassets.com/pinned-octocat.svg" alt>
          </a>
        </div>
      </div>-->
      <el-scrollbar class="left-scrollbar">
        <div class="components-list">
          <div v-for="(item, listIndex) in leftComponents" :key="listIndex">
            <div class="components-title">
              <svg-icon icon-class="component" />
              {{ item.title }}
            </div>
            <draggable
              :list="item.list"
              :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
              :clone="cloneComponent"
              :sort="false"
              draggable=".components-item"
              class="components-draggable"
              @end="onEnd"
            >
              <div
                v-for="(element, index) in item.list"
                :key="index"
                class="components-item"
                @click="addComponent(element)"
              >
                <div class="components-body">
                  <svg-icon :icon-class="element.__config__.tagIcon" />
                  {{ element.__config__.label }}
                </div>
              </div>
            </draggable>
          </div>
        </div>
      </el-scrollbar>
    </div>

    <div v-if="form.busMainData.formName !== ''" class="center-board">
      <div class="action-bar">
        <el-tag type="danger">{{ form.busMainData.formName }}</el-tag>
        <el-button v-permission="['SYS_ADMIN','COMMON_ADMIN','FORM_SET_ALL','FORM_SET_CHANGE','FORM_SET_CREATE']" v-loading="loading" v-if="form.busPageInfo.editable" icon="el-icon-plus" type="text" @click="saveForm">
          保存
        </el-button>
        <el-button v-permission="['SYS_ADMIN','COMMON_ADMIN','FORM_SET_ALL','FORM_SET_CHANGE','FORM_SET_CREATE']" v-loading="loading" v-if="form.busPageInfo.editable" icon="el-icon-delete" type="text" @click="resetForm">
          重置
        </el-button>
        <el-button v-permission="['SYS_ADMIN','COMMON_ADMIN','FORM_SET_ALL','FORM_SET_CHANGE','FORM_SET_CREATE']" icon="el-icon-view" type="text" @click="formPreview">
          预览
        </el-button>
        <el-button v-permission="['SYS_ADMIN']" icon="el-icon-video-play" type="text" @click="run">
          运行
        </el-button>
        <el-button v-permission="['SYS_ADMIN']" icon="el-icon-view" type="text" @click="showJson">
          查看json
        </el-button>
        <el-button v-permission="['SYS_ADMIN']" icon="el-icon-download" type="text" @click="download">
          导出vue文件
        </el-button>
        <el-button v-permission="['SYS_ADMIN','COMMON_ADMIN','FORM_SET_ALL','FORM_SET_CHANGE','FORM_SET_CREATE']" class="copy-btn-main" icon="el-icon-document-copy" type="text" @click="copy">
          复制代码
        </el-button>
        <el-button v-permission="['SYS_ADMIN','COMMON_ADMIN','FORM_SET_ALL','FORM_SET_CHANGE','FORM_SET_CREATE']" v-if="form.busPageInfo.editable" class="delete-btn" icon="el-icon-delete" type="text" @click="empty">
          清空
        </el-button>
      </div>
      <el-scrollbar class="center-scrollbar">
        <el-row :gutter="formConf.gutter" class="center-board-row">
          <el-form
            :size="formConf.size"
            :label-position="formConf.labelPosition"
            :disabled="formConf.disabled"
            :label-width="formConf.labelWidth + 'px'"
          >
            <draggable :list="drawingList" :animation="340" class="drawing-board" group="componentsGroup">
              <draggable-item
                v-for="(element, index) in drawingList"
                :key="element.renderKey"
                :drawing-list="drawingList"
                :element="element"
                :index="index"
                :active-id="activeId"
                :form-conf="formConf"
                @activeItem="activeFormItem"
                @copyItem="drawingItemCopy"
                @deleteItem="drawingItemDelete"
              />
            </draggable>
            <div v-show="!drawingList.length" class="empty-info">
              从左侧拖入或点选组件进行表单设计
            </div>
          </el-form>
        </el-row>
      </el-scrollbar>
    </div>

    <right-panel
      :active-data="activeData"
      :form-conf="formConf"
      :show-field="!!drawingList.length"
      @tag-change="tagChange"
    />

    <form-drawer
      :visible.sync="drawerVisible"
      :form-data="formData"
      :generate-conf="generateConf"
      size="100%"
    />
    <form-preview
      :visible.sync="previewVisible"
      :form-data="formData"
      :generate-conf="generateConf"
      :width="formConf.formWidth + '%'"
    />
    <json-drawer
      :visible.sync="jsonDrawerVisible"
      :json-str="JSON.stringify(formData)"
      size="60%"
      @refresh="refreshJson"
    />
    <code-type-dialog
      :visible.sync="dialogVisible"
      :show-file-name="showFileName"
      title="选择生成类型"
      @confirm="generate"
    />
    <input id="copyNode" type="hidden">
  </div>
</template>

<script>
import draggable from 'vuedraggable'
import { debounce } from 'throttle-debounce'
import { saveAs } from 'file-saver'
import beautifier from 'js-beautify'
import ClipboardJS from 'clipboard'
import render from '@/views/formgenerator/components/render/render'
import FormDrawer from './FormDrawer'
import FormPreview from './FormPreview'
import JsonDrawer from './JsonDrawer'
import RightPanel from './RightPanel'
import {
  inputComponents, selectComponents, layoutComponents, formConf
} from '@/views/formgenerator/components/generator/config'
import { beautifierConf, titleCase } from '@/utils/index'
import {
  makeUpHtml, vueTemplate, vueScript, cssStyle
} from '@/views/formgenerator/components/generator/html'
import { makeUpJs } from '@/views/formgenerator/components/generator/js'
import { makeUpCss } from '@/views/formgenerator/components/generator/css'
import drawingDefalut from '@/views/formgenerator/components/generator/drawingDefalut'
import CodeTypeDialog from './CodeTypeDialog'
import DraggableItem from './DraggableItem'
import { viewMainData, doSaveFormDesign } from '@/api/system/formSet'

import {
  getDrawingList, saveDrawingList, saveCustomForm, getIdGlobal, saveIdGlobal, getFormConf, setFormId, getFormSysGenCode, setFormSysGenCode
} from '@/utils/db'

let oldActiveId
let tempActiveData
const drawingListInDB = getDrawingList()
const formConfInDB = getFormConf()
const idGlobal = getIdGlobal()

export default {
  components: {
    draggable,
    render,
    FormDrawer,
    FormPreview,
    JsonDrawer,
    RightPanel,
    CodeTypeDialog,
    DraggableItem
  },
  data() {
    return {
      form: {
        busMainData: {
          formName: '',
          id: ''
        },
        busPageInfo: {
          editable: true
        },
        formSetContentVO: {
          formContent: '',
          formHtml: '',
          formJson: ''
        }
      },
      loading: false,
      idGlobal,
      formConf,
      inputComponents,
      selectComponents,
      layoutComponents,
      labelWidth: 100,
      drawingList: drawingDefalut,
      drawingData: {},
      activeId: drawingDefalut[0].formId,
      drawerVisible: false,
      previewVisible: false,
      formData: {},
      dialogVisible: false,
      jsonDrawerVisible: false,
      generateConf: null,
      showFileName: false,
      activeData: drawingDefalut[0],
      saveDrawingListDebounce: debounce(340, saveDrawingList),
      saveCustomFormDebouce: debounce(340, saveCustomForm),
      saveIdGlobalDebounce: debounce(340, saveIdGlobal),
      leftComponents: [
        {
          title: '输入型组件',
          list: inputComponents
        },
        {
          title: '选择型组件',
          list: selectComponents
        },
        {
          title: '布局型组件',
          list: layoutComponents
        }
      ]
    }
  },
  computed: {
  },
  watch: {
    // eslint-disable-next-line func-names
    'activeData.__config__.label': function(val, oldVal) {
      if (
        this.activeData.placeholder === undefined ||
        !this.activeData.__config__.tag ||
        oldActiveId !== this.activeId
      ) {
        return
      }
      this.activeData.placeholder = this.activeData.placeholder.replace(oldVal, '') + val
    },
    activeId: {
      handler(val) {
        oldActiveId = val
      },
      immediate: true
    },
    drawingList: {
      handler(val) {
        this.saveDrawingListDebounce(val)
        this.saveCustomFormDebouce(this.form.busMainData)
        if (val.length === 0) this.idGlobal = 100
      },
      deep: true
    },
    idGlobal: {
      handler(val) {
        this.saveIdGlobalDebounce(val)
      },
      immediate: true
    }
  },
  mounted() {
    // fix: firefox 下 拖拽 会新打卡一个选项卡
    document.body.ondrop = event => {
      event.preventDefault()
      event.stopPropagation()
    }

    const clipboard = new ClipboardJS('#copyNode', {
      text: trigger => {
        const codeStr = this.generateCode()
        this.$notify({
          title: '成功',
          message: '代码已复制到剪切板，可粘贴。',
          type: 'success'
        })
        return codeStr
      }
    })
    clipboard.on('error', e => {
      console.log(e)
      this.$message.error('代码复制失败')
    })
    const formId = this.$route.query.formId
    const sysGenCode = this.$route.query.sysGenCode
    const localSysGenCode = getFormSysGenCode()
    if (localSysGenCode && localSysGenCode !== sysGenCode) {
      this.$confirm('本地缓存表单与当前要设计不一样,确认放弃本地缓存表单:' + localSysGenCode + '?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        setFormId(formId)
        setFormSysGenCode(sysGenCode)
        this.loadMainData(formId, false)
      })
    } else {
      setFormId(formId)
      setFormSysGenCode(sysGenCode)
      this.loadMainData(formId, true)
    }
  },
  methods: {
    localLocalData() {
      if (Array.isArray(drawingListInDB) && drawingListInDB.length > 0) {
        this.drawingList = drawingListInDB
      } else {
        this.drawingList = drawingDefalut
      }
      if (formConfInDB) {
        this.formConf = formConfInDB
      }
    },
    loadMainData(mainId, loadLocal) {
      const data = { paramBean: { id: mainId }}
      viewMainData(data).then(res => {
        this.form = res.data
        if (loadLocal) {
          this.localLocalData()
        } else {
          const formJson = this.form.formSetContentVO.formJson
          if (formJson) {
            const formJsonObject = JSON.parse(formJson)
            this.refreshJson(formJsonObject)
          } else {
            this.drawingList = drawingDefalut
            this.formConf = formConfInDB
          }
        }
        this.loading = false
        this.activeFormItem(this.drawingList[0])
      })
    },
    activeFormItem(element) {
      this.activeData = element
      this.activeId = element.__config__.formId
    },
    onEnd(obj) {
      if (obj.from !== obj.to) {
        this.activeData = tempActiveData
        this.activeId = this.idGlobal
      }
    },
    addComponent(item) {
      const clone = this.cloneComponent(item)
      this.drawingList.push(clone)
      this.activeFormItem(clone)
    },
    cloneComponent(origin) {
      const clone = JSON.parse(JSON.stringify(origin))
      const config = clone.__config__
      config.formId = ++this.idGlobal
      config.span = formConf.span
      config.renderKey = +new Date() // 改变renderKey后可以实现强制更新组件
      if (config.layout === 'colFormItem') {
        clone.__vModel__ = `${config.tagIcon}_${this.idGlobal}`
        clone.placeholder !== undefined && (clone.placeholder += config.label)
      } else if (config.layout === 'rowFormItem') {
        config.componentName = `${config.tagIcon}_${this.idGlobal}`
        config.gutter = this.formConf.gutter
      }
      tempActiveData = clone
      return tempActiveData
    },
    AssembleFormData() {
      this.formData = {
        fields: JSON.parse(JSON.stringify(this.drawingList)),
        ...this.formConf
      }
    },
    generate(data) {
      const func = this[`exec${titleCase(this.operationType)}`]
      this.generateConf = data
      func && func(data)
    },
    execPreview(data) {
      this.AssembleFormData()
      this.previewVisible = true
    },
    execRun(data) {
      this.AssembleFormData()
      this.drawerVisible = true
    },
    execDownload(data) {
      const codeStr = this.generateCode()
      const blob = new Blob([codeStr], { type: 'text/plain;charset=utf-8' })
      saveAs(blob, data.fileName)
    },
    execCopy(data) {
      document.getElementById('copyNode').click()
    },
    empty() {
      this.$confirm('确定要清空所有组件吗？', '提示', { type: 'warning' }).then(
        () => {
          this.drawingList = []
          this.idGlobal = 100
        }
      )
    },
    drawingItemCopy(item, parent) {
      let clone = JSON.parse(JSON.stringify(item))
      clone = this.createIdAndKey(clone)
      parent.push(clone)
      this.activeFormItem(clone)
    },
    createIdAndKey(item) {
      const config = item.__config__
      config.formId = ++this.idGlobal
      config.renderKey = +new Date()
      if (config.layout === 'colFormItem') {
        item.__vModel__ = `${config.tagIcon}_${this.idGlobal}`
      } else if (config.layout === 'rowFormItem') {
        config.componentName = `${config.tagIcon}_${this.idGlobal}`
      }
      if (Array.isArray(config.children)) {
        config.children = config.children.map(childItem => this.createIdAndKey(childItem))
      }
      return item
    },
    drawingItemDelete(index, parent) {
      parent.splice(index, 1)
      this.$nextTick(() => {
        const len = this.drawingList.length
        if (len) {
          this.activeFormItem(this.drawingList[len - 1])
        }
      })
    },
    generateCode() {
      const { type } = this.generateConf
      this.AssembleFormData()
      const script = vueScript(makeUpJs(this.formData, type))
      const html = vueTemplate(makeUpHtml(this.formData, type))
      const css = cssStyle(makeUpCss(this.formData))
      return beautifier.html(html + script + css, beautifierConf.html)
    },
    resetForm() {
      this.$confirm('确认要重置还原 ?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.loading = true
        this.loadMainData(this.form.busMainData.id, false)
      })
    },
    saveForm() {
      this.loading = true
      this.generateConf = { fileName: this.form.busMainData.id + '.vue', type: 'file' }
      // 解析html ,js
      const { type } = this.generateConf
      const formContent = this.generateCode()
      const formHtml = beautifier.html(makeUpHtml(this.formData, type), beautifierConf.html)
      const formJs = beautifier.js(makeUpJs(this.formData, type), beautifierConf.js)
      this.form.formSetContentVO.formContent = formContent
      this.form.formSetContentVO.formHtml = formHtml
      this.form.formSetContentVO.formJs = formJs
      this.form.formSetContentVO.formJson = JSON.stringify(this.formData)
      doSaveFormDesign(this.form).then(res => {
        this.form.formSetContentVO = res.data.formSetContentVO
        this.loading = false
        setFormId('')
        setFormSysGenCode('')
      }).catch(err => {
        this.loading = false
        console.log(err)
      })
    },
    formPreview() {
      this.operationType = 'preview'
      this.generate({ fileName: this.form.busMainData.id + '.vue', type: 'file' })
    },
    showJson() {
      this.AssembleFormData()
      this.jsonDrawerVisible = true
    },
    download() {
      this.dialogVisible = true
      this.showFileName = true
      this.operationType = 'download'
    },
    run() {
      this.dialogVisible = true
      this.showFileName = false
      this.operationType = 'run'
    },
    copy() {
      this.dialogVisible = true
      this.showFileName = false
      this.operationType = 'copy'
    },
    tagChange(newTag) {
      newTag = this.cloneComponent(newTag)
      const config = newTag.__config__
      this.activeData.__vModel__ = undefined
      // newTag.__vModel__ = this.activeData.__vModel__
      config.formId = this.activeId
      config.span = this.activeData.__config__.span
      this.activeData.__config__.tag = config.tag
      this.activeData.__config__.tagIcon = config.tagIcon
      this.activeData.__config__.document = config.document
      if (typeof this.activeData.__config__.defaultValue === typeof config.defaultValue) {
        config.defaultValue = this.activeData.__config__.defaultValue
      }
      Object.keys(newTag).forEach(key => {
        if (this.activeData[key] !== undefined) {
          newTag[key] = this.activeData[key]
        }
      })
      this.activeData = newTag
      this.updateDrawingList(newTag, this.drawingList)
    },
    updateDrawingList(newTag, list) {
      const index = list.findIndex(item => item.__config__.formId === this.activeId)
      if (index > -1) {
        list.splice(index, 1, newTag)
      } else {
        list.forEach(item => {
          if (Array.isArray(item.__config__.children)) this.updateDrawingList(newTag, item.__config__.children)
        })
      }
    },
    refreshJson(data) {
      this.drawingList = JSON.parse(JSON.stringify(data.fields))
      delete data.fields
      this.formConf = data
    }
  }
}
</script>

<style lang='scss'>
@import '@/views/formgenerator/styles/index.scss';
@import '@/views/formgenerator/styles/home.scss';
</style>
